So as all can see summer is almost over, and since my coach at school isn't really going to do any warm-up practice before the games, I thought I'd work out a little and get back in shape before school starts and get ahead of my teammates. So does anyone have any ideas on how I can work out how long and how hard to do so?? Thank you.

well thanks but uh..... i was also wondering... what if we're talking in terms of getting back in the habits and your form... is there any suggestion on what drills to do. Like the tennis part of the game instead of fitness?? thanks again

you could always try and find a hitting partner or a ball machine and just work on your form 1-2 times a week. After warming up your arm work on your serves as well. You probably don't need to spend that much time unless you wanna be a super star but 2-4 hours a week before a season isn't a bad regiment. As far as the fitness part goes I would agree running a bit might help, especially if you've been sitting on the couch all summer